Build Your Own Clone Message Board

In the last run of Flanger PCBs, there is a resistor space labelled 47k. It should be 1K. This is the feedback limiting resistor. 47k is too high and gives a very weak or almost no feedback at all. Sorry for any confusion and/or frustration. The good news is that it's a very simple fix.



The only confusing part is whether or not you have one of the PCBs that needs this change. If you have one of the flangers from the first run of Rev1.0 PCBs, you do not need to change anything. Everything is labelled correctly. You'll know you have a first run flanger because it will say "BETA" on it, even though it's not a BETA board (we forgot to remove that when we went to production). BETA will be printed vertically along side the 1N4001 diode at the top center of the PCB near the off board wiring eyelets for the DC adaptor jack.

If your PCB says REV1.0 with the word BETA on it, or if you have a newer REV1.1 or higher, then you don't need to worry about this. If you're at all confused by this, just build it according to the instructions. This isn't a major fix. When you're done, if you've got a great sounding chorus pedal, but the REGEN knob isn't giving you any sort of flange-like feedback, then you probably need to change the 47k resistor to a 1k.

If you've got a Flanger pedal that just has problems and isn't doing anything at all or isn't giving you a proper chorus effect DO NOT EVEN CONCERN YOURSELF WITH THIS!!!!! THIS PROBLEM IS VERY MINOR AND WOULD NOT AFFECT ANYTHING OTHER THAN THE REGEN KNOB!!!!

Hi There!

I changed the 47 to a 1k because I had the no good feedback problem.
BUT when I had changed it I saw the ''REV 1.0'' on the board, tried the pedal and got no sound from it anymore except a extreme (but low volyme) feedback sound on the amps backround noise that you could play around with.
This was ONLY when the regen knob was totaly turned clockwise, other than that : no sound

What has gone down here? What value is right, cus I had kind of crappy regeneration before?

thanks

Hi Dencman. It sounds like you have another, unrelated problem with your build. If you messed up the 47k/1k swap, it would not kill the output. Please start a new support thread and we'll help you get it going.

Yeah ok. That was what I was thinking..
But if you have a REV 1.0 and changed the 47 to a 1, would that be way too low value then or?

Thanks

No, you'd actually get more signal through the regen circuit. You probably had an iffy connection somewhere that went bad when you switched out the resistor.

So, if you have a Rev 1.0 Beta PCB, it ships with a 47k resistor instead of the 7th 1k which should be placed in the 47k spot? I just want to make sure before I progress anymore.

If your pcb reads rev 1.0 with the word Beta on it, you do not need to change anything.